Renal function tests should clarify this concept. First of all, it is necessary to clarify what is renal function. Renal function mainly includes the filtration function of the kidney, the reabsorption function of the renal tubules, the concentration and dilution of urine, and the regulation of water, salt metabolism, and acid-base balance by the kidneys. Therefore, a comprehensive renal function test includes the evaluation of the above functions.
First of all, we look at the examination of renal filtration function mainly through blood tests to determine the glomerular filtration rate. The main indicators of the examination are blood urea nitrogen and creatinine, which are all blood tests, and the reabsorption function of renal tubules , mainly to check the β2 globulin in the urine, and for the concentration and dilution function of the urine, mainly to check the specific gravity of the urine, for the evaluation of the endocrine function, mainly to check the erythropoietin in the blood, and the acid-base balance of water and salt metabolism The check of the regulation function is to check the electrolytes in the blood, as well as the carbon dioxide in the blood.